Duplicator cylinder bearing



March 2, 1954 P. A. STEPHENSON DuPLIcAToR CYLINDER BEARING 2 Sheets-Sheet l Fiied June 11, 194e rl. milt] L,

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l DUPLICATOR CYLINDER BEARING Filed June l1, 1949 side frame members 25 and 22 of the duplicator. The left-hand or driving trunnion 23 comprises a shaft journaled in and axially positioned by a suitable bearing 24 carried by the frame member 2I. It is provided at its outer end with driving means, such as a gear train usually employed forI this purpose, not shown. The` inner end of the shaft 23 is an easy sliding t in the opening I6 so that the cylinder Will be aligned on the left side by contact of the annular ange I8 with the surface of shaft 23 when the cylinder is in operative position. Adjacent the bearing 24 the shaft 23 carries a driving disk 26, rigidly secured thereto, the periphery of which is formed with a notch 21 having laterally disposed ears 28 at each side thereof, through which the cylinder may be driven. f

Rigidly secured to the frame member '22 on the right side of the machine is a bracket plate 3| having a, portion parallel to and spaced from the frame member 22 as indicated in Fig. l, in which the right-hand bearing structure is mounted. This structure includes a bearing 32 rigidly mounted in and projecting through the plate 3| in alignment with the axis of rotation. Pivotally mounted in the supporting bearing 32 is a sleeve 33 projecting inwardly through the plate 3I towardthe side frame member 22. The outer end of the sleeve 33 is closed by a cap member 34, which may be integral with the sleeve and formed with an extension 36 providing avlever arm by which the sleeve may be oscillated within the bearing 32. The sleeve 33 is axially positioned within the bearing 32 between its cap 34, which contacts the outer end of the bearing 32, and a latch 31 adapted to engage in an annular groove 38 provided in the outer surface or the sleeve. This latch member 31 is pivotally mounted as at 33 on the bracket plate 3l and is urged into engagement with the groove 38 by means of 'a spring 4I as clearly shown in Fig. 4. The latch 31 is also provided with a projecting handle portion 42 by means of which the latch may be depressed against the action of spring 4I to release the sleeve 33 and permit it to be withdrawn from the bearing 32.

The lever 38 is also provided with a hand knob 43 by which it may be conveniently oscillated to correspondingly turn the sleeve 33 in the bearing 32.` The knob 43 is preferably provided with a spring pressed latch pin 44, adapted to ride upon a segment piece 48 as best shown in Fig. 4, the segment being provided with a hole 4'1 adapted to be engaged by the pin 44 to retain the sleeve 33 'frame member 22. The midportion of the trunnion member 48 is formed with a bearing surface I of slightly reduced diameter, adapted to engage a bearing 52 mounted on the frame member 22, so that the member 48 is rigidly supported in the axis of rotation. It is also slidably but non-rotatably connected to the sleeve 33 as by means of a key 53, cooperating in a keyway 54, so as to turn with the sleeve in response to pivotal movements caused by oscillation of the lever 38. The `inner portion of the trunnion member 48 is formed with a bearing portion 58 of further reduced diameter defining a shoulder 51, and its end is formed with a transverse slot 58 and with an axially disposed threaded hole 53.

The trunnion bearing 6I of this invention is journaled to freely rotate on the bearing portion 53 of the trunnion member 48, being formed for this purpose with an annular bearing portion 82 which extends from the shoulder 51 to the end or" the trunnion member. This trunnion bearing 6I is also formed with a projecting annular portion 33, preferably integral with the portion 32 and adapted to makev an easy sliding t in the opening I1 so that the annular flange I9 is in operative contact therewith when the cylinder is mounted for rotation. The portions 32 and 83 of the trunnion bearing 6I are separated by a radially disposed fiange 64 of square configuration as clearly shown in Figs. 6 and 8. This ange is adapted to contact the cylinder head member I4 in the region adjacent the opening I1 and to be removably secured to the head member so as to position the cylinder I8 on the axis of rotation, as will be presently described.

Secured to the end of the trunnion member 48 within the annular portion 63 of the trunnion bearing is 'a clutch and retaining member 88, so formed as to retain the bearing axially in place against the shoulder 51 and also to transmit oscillatory movements of the member 48. For this purpose the member 88 is formed on one side with a transverse rib 61 adapted to seat in the slot 58, and on the other side with a radially disposed slot 38 communicating with a centrally counterbored portion 69 communicating with the threaded hole 59. The membei` 66 is removably retained in position by means of a screw 1I seated in the counterbore 69 and engaging the threaded hole. It will be apparent that theretaining member 66 is secured to the end of the trunnion member 48 in such manner as to engage the annular bearing portionV 82, so that this portion is retained against axial movement between the member 66 and the shoulder 51. Accordingly, the trunnion bearing 6I is rotatably journaled on the trunnion member 48 but is axially fixed thereon.

The radial slot 68 is so disposed as to be engageable with a crank pin 12 formed on the end of a shaft 13 pivotally mounted within the cylinder I8 in any convenient manner, not shown. This shaft 13 may be utilized for the oscillatory operation, at intermittent intervals as required, of ink distributing mechanism in any conventional construction mounted within the cylinder in the manner which is well-known in this art. In this way the shaft 13 may be oscillated from the outside of the machine, and while the machine is running, by turning the handle 43 through an arc as previously described. Such oscillatory motion is transmitted through the lever 36 to the sleeve 33 and thence by means of the key 53 to the trunnicn member 48, the member 65 and the pin 12 to the shaft 13.

Means is also provided whereby the cylinder I8 may be axially positioned in the machine and laterally adjusted whilethe machine is running, for which purpose the cylinder may be removably secured tothe flange 84 of the trunnion bearing. Rigidly secured to the cylinder head I4 is a bracket member 16, best shown in Figs. l and 6, on which a latch lever 11 is pivotally mounted as at 18. This latch lever 11 is provided with a portion 19 which may be swung into engagement behind a lug 8I formed on the bracket member. It is also formed with a latch portion 82 which may be moved into position to overlap and retain the ange 64 as clearly shown in Fig. 6. With the lever 11 in its retracted position the trunnion bearing is moved axially toward the cylinder to engage the flange against the head member I4. Pivotal movement of the lever 11 then moves the portion 82 to overlap the flange and secure the cylinder thereto.

To provide axial movement of the trunnion bearing 6I, the trunnion member 48 is provided at its outer end with a threaded bore 83, cooperable with an adjusting screw 84 which is journaled in the cap Ymember 34 by any suitable bearing. The screw84 projects through the cap member 34- and is provided with a knob 85 by which it may be turned to advance or retract the trunnion member d8 in the sleeve 33 as required. In this manner the trunnion :bearing 6I may be retracted, to permit the cylinder to be placed in position between the supporting members 23 and 63, and may then be advanced by means of the screw 84 so as to move the annular portion 63 into the opening I1 and into engagement with the annular flange I9.

My invention also contemplates means whereby the cylinder' may be accurately and easily placed in position in the machine with its openings I6 and I1 in alignment with the cooperating bearing parts 23 and 63 respectively- To this end the bracket 16 is formed with laterally extending spaced ears 8B, having hooked end portions 81, which ears are arranged at an angle of 45 degrees to the vertical so as to engage two adjacent sides of the square flange 16 in the manner clearly y shown in Fig. 6. It will be evident that this construction is so arranged as to automatically turn the trunnion bearing 6I as the cylinder I0 is lowered into position between the side frame members, so that the diagonal of the llange 64 is in a vertical position and the Weight of the cylinder is equally divided between the two upper edges of the square flange. The ears 81 are so proportioned and arranged that when they are resting on the edges of the liange 64 as indicated the axis of the trunnion is in line with the axis of the cylinder and the trunnion bearing member 63 may then be moved laterally into the opening I1 in the manner previously described.

On the other cylinder head I3, the outwardly disposed annular flange I8, pivotally supports a circular hub 88, secured to the head I3 as by means of headed bolts 89 arranged in slots 9I so as to permit a limited pivotal movement of the hub 88 about the flange I8. The hub 88 is also formed with a radially disposed lever portion 92 having an enlarged end with an arcuate slot 93, as best shown in Fig. 2. Mounted on the head I6 and disposed to pass through the slot 93 is a stud 94 provided at its outer end with a suitable handle 96. Suitable locking means of any convenient construction is employed to lock the lever 92 to the cylinder head I8, as for example the cam washers 91 indicated in Fig. 3. Also formed on the lever 92 is a driving lug 98 adapted to engage in the notch 21 of the driving disk 26 whereby the cylinder may be driven as previously described.

Formed on the lever hub 88 adjacent the flange I8 are a pair of laterally and downwardly projecting ears 99 which are adapted to engage the trunnion shaft 23 when the cylinder is lowered into position between the side frame members of the machine. These ears 99 are so disposed and spaced that when they are in contact with the trunnion shaft as shown in Figs. 1 and 2, the lefthand side of the cylinder will be supported with its axis of rotation in alignment with the axis of the trunnion 23.

It will be observed that by means of the construction above described the angular position of' the cylinder Ill with respect to the driving disk 2G may be adjustably varied. Accordingly, the position of the lirst stencilized line of the stencil I2' may be raised or lowered, if desired, with respect to the leading edge of the impression paper. At the same time the driving arm 92- may be rigidly clamped to the cylinder in the position of adjustment as selected.v

The operation of my bearing construction will be readily understood from the foregoing description, and it will be evident that the cylinder may be readily removed from the machine by first operating the latch lever T1 so as to disengage the latch portion 32 from the flange 64. The knob 85 is then turned so as to retract the trunnion member 48 to its` extreme right-hand position. This movement iirst withdraws the bearing portion 63 from the opening I1, leaving the right-hand side of the cylinder supported on the ears 86. After the bearing 63 has been disengaged', the flange 64 will be engaged by the hooked ends 81 of the ears 86 so that the cylinder will be drawn to the right until the bearing 23 has been disengaged from the opening I6, leaving the left-hand side of the cylinder supported upon the ears 99. In thisposition the cylinder 'may be lifted straight up and out of the machine. I

In the reverse operation the cylinder is picked up, an operation requiring both hands, and lowered into the machine between the side frame members 2| and 22 until the ears 86 and 99 come into contact with the liange 64 and the bearing 23 respectively. This stops the lowering movement of the cylinder at exactly the point at which its axis is in line with the axis of rotation and prevents it from striking against the impression roller I I, the paper feed mechanism or other portions of the machine. The knob is now turned to advance the trunnion member 48 so that the bearing portion 63 enters the opening I1 and the flange 64 engages the side face of the cylinder head I4. Continued movement of the trunnion member 48 will then move the cylinder toward the left until the bearing 23 enters the opening I6 and the driving lug 98 engages in its notch 21. The latch 11 is then closed to engage the outer face of the flange 64, in the manner previously described, and the cylinder may be adjusted in either direction until it is in the desired position for the copy to be duplicated.

It will also be noted that this mechanism provides means for making small adjustments in the axial position of the cylinder, without stopping the machine. Thus the matter which is printed upon the impression sheets can be shifted a small amount to the right or to the left by moving the cylinder, and with it the stencil I2, in the appropriate direction so as to place the resulting print in the proper location on the impressionV sheets.

It will be understood that various forms of my invention other than those described above may be used without departing from the spirit or scope of the invention.

What I claim is:

l. In a duplicating machine having a rotaryr printing cylinder including heads formed with axially disposed openings and having an axially disposed shaft within the cylinder, a trunnion member adjustable axially of the cylinder and pivotally movable about said axis, a trunnion bearing journaled on said trunnion member engageable in said head opening to rotatably support the cylinder, and a clutch member carried by the trunnion member extending through and axially engaging the trunnion bearing adapted to retain said bearing and to connect the trunnion member to said cylinder shaft.

2. In a duplicating machine having a printing cylinder including a head member formed with an axially disposed opening, a rotatable trunnion bearing engageable in said opening and formed with a square flange having an inner face engageable with the head member, spaced ears carried by the head member and engageable With the ange to automatically align said head opening with the trunnion bearing, and a. latch member carried by the head member pivotally movable into retaining engagement with said ange.

3. In a duplicating machine having a printing cylinder including a head member formed with an axially disposed opening, a rotatable trunnion bearing engageable in said opening and formed with a square frange having an inner face engageable with the head member, spaced ears carried by the head member and engageable with adjacent edges of said square flange to automatically align the head opening with the trunnion bearing, and threaded means to move the trunnion bearing axially, said ears being forms with hook portions engageable with the outer face of the ange.

4. In a duplicating machine having a printing cylinder including rigidly secured head members atl each end thereof, aligned trunnion bearings adapted rotatably to support the cylinder through said head members, one said head member being axiallyslidable .on its cooperating trunnion bearing,vmeans axially to adjust the other trunnion bearing, and pivoted latch means carried on the cylinder removably to secure the other head member to the adjustable trunnion bearing for transmission to the cylinder of axial adjustments of said bearing in both directions.

, PAUL A. STEPHENSON.

References Cited in the ille of this patent UNITED STATES PATENTS Number Name Y Date 975,299 Smith, Jr. Nov. 8, 1910 1,737,378 Littel Nov. 26, 1929 1,816,948 Wood Aug. 4, 1931 2,460,504 Huebner Feb. 1, 1949 FOREIGN PATENTS Number Country Date 508,383 Germany Sept. 26, 1930 

